From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S940636AbXGaDsv (ORCPT ); Mon, 30 Jul 2007 23:48:51 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S935445AbXGaDsn (ORCPT ); Mon, 30 Jul 2007 23:48:43 -0400 Received: from stout.engsoc.carleton.ca ([134.117.69.22]:34229 "EHLO stout.engsoc.carleton.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1761350AbXGaDsn (ORCPT ); Mon, 30 Jul 2007 23:48:43 -0400 Date: Mon, 30 Jul 2007 23:48:41 -0400 From: Kyle McMartin To: Joseph Pingenot Cc: linux-kernel@vger.kernel.org Subject: Re: inotify and /proc/ Message-ID: <20070731034841.GA16495@fattire.cabal.ca> References: <20070731021615.GB6812@digitasaru.net> <20070731031720.GF21089@ftp.linux.org.uk> <20070731032521.GD6812@digitasaru.net> <20070731033113.GE6812@digitasaru.net> <20070731033631.GH21089@ftp.linux.org.uk> <20070731034059.GF6812@digitasaru.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070731034059.GF6812@digitasaru.net> User-Agent: Mutt/1.5.13 (2006-08-11) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Jul 30, 2007 at 10:40:59PM -0500, Joseph Pingenot wrote: > From Al Viro on Tuesday, 31 July, 2007: > >On Mon, Jul 30, 2007 at 10:31:13PM -0500, Joseph Pingenot wrote: > >> >From Joseph Pingenot on Monday, 30 July, 2007: > >> >From Al Viro on Tuesday, 31 July, 2007: > >> >>On Mon, Jul 30, 2007 at 09:16:16PM -0500, Joseph Pingenot wrote: > >> >>> I was trying to use inotify to watch process changes (especially process > >> >>> termination) by watching /proc/. > >> >>> Sadly, although I could see something reading various files, nothing > >> >>> was issued when the process I was watching exited and the directory > >> >>> went away. > >> >>> Is this intentional, or a bug? > >> >>It's a bug you intend to introduce in your program... IOW, don't > >> >>do that. > >> >More background, please? > >> >What's the way to check for a process exiting without spinning? > >> I should also specify that the process being waited on is not a > >> child process-it's just some other process on the system. > >Umm... Any details on intended use? IOW, is that "I want to write > >an utility that would wait for given PID to exit, just for the hell > >of it" or is there something you are trying to implement using that? > > I'm trying to implement pwait. It blocks until a specified PID exits, > and then it exits. > ptrace with options set to PTRACE_O_TRACEEXIT? --Kyle